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Observations on the Total (with Duration) and Annular Eclipse of the Sun, Taken on the 24th of June, 1778, on Board the Espagne, Being the Admiral's Ship of the Fleet of New Spain, in the Passage from the Azores towards Cape St. Vincent's. By Don Antonio Ulloa, F. R. S. Commander of the Said Squadron; Communicated by Samuel Horsley, LL.D. F. R. S.